393959089 has 2 divisors, whose sum is σ = 393959090. Its totient is φ = 393959088.

The previous prime is 393959081. The next prime is 393959141. The reversal of 393959089 is 980959393.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 386712225 + 7246864 = 19665^2 + 2692^2 .

It is a cyclic number.

It is not a de Polignac number, because 393959089 - 2³ = 393959081 is a prime.

It is not a weakly prime, because it can be changed into another prime (393959081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 196979544 + 196979545.

It is an arithmetic number, because the mean of its divisors is an integer number (196979545).

Almost surely, 2^393959089 is an apocalyptic number.

It is an amenable number.

393959089 is a deficient number, since it is larger than the sum of its proper divisors (1).

393959089 is an equidigital number, since it uses as much as digits as its factorization.

393959089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2361960, while the sum is 55.

The square root of 393959089 is about 19848.4026813243. The cubic root of 393959089 is about 733.0783181934.

It can be divided in two parts, 39395 and 9089, that added together give a palindrome (48484).

The spelling of 393959089 in words is "three hundred ninety-three million, nine hundred fifty-nine thousand, eighty-nine".